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Share-based payment reserve - Assumption and Valuation of share based expenses (Details) - ZAR (R)
12 Months Ended
Jun. 01, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based payment transaction        
Equity-settled share-based payment   R 1,659,000,000 R 3,776,000,000 R 463,000,000
Sasol Khanyisa share transaction        
Share-based payment transaction        
Equity-settled share-based payment   952,000,000 R 2,953,000,000  
Risk-free interest rate     8.08%  
Expected volatility     28.49%  
Sasol Khanyisa share transaction | Minimum        
Share-based payment transaction        
Expected dividend yield     1.80%  
Sasol Khanyisa share transaction | Maximum        
Share-based payment transaction        
Expected dividend yield     10.10%  
Tier 1 - Khanyisa Employee Share Ownership Plan (ESOP)        
Share-based payment transaction        
Equity-settled share-based payment   R 628,000,000 R 52,000,000  
Remaining vesting period   1 year 10 months 24 days    
Vesting period 3 years      
ESOP - Tier1 to SOL        
Share-based payment transaction        
Number of SOL shares   2,082,520    
Weighted average fair value on grant date   R 481.50    
Total IFRS expense   1,003,000,000    
Equity-settled share-based payment   R 334,000,000    
ESOP - Tier1 to SOLBE1        
Share-based payment transaction        
Number of SOLBE1 shares   2,396,048    
Weighted average fair value on grant date   R 370.00    
Total IFRS expense   887,000,000    
Equity-settled share-based payment   294,000,000    
SSA (Tier 2 and Khanyisa Public)        
Share-based payment transaction        
Strike price   R 326.55    
Tier 2 - Khanyisa ESOP        
Share-based payment transaction        
Number of Sasol Khanyisa shares   26,503,642    
Weighted average fair value on grant date   R 66.48    
Total IFRS expense   1,762,000,000    
Equity-settled share-based payment   R 324,000,000 35,000,000  
Remaining vesting period   4 years 8 months 12 days    
Tier 2 - Khanyisa ESOP | Minimum        
Share-based payment transaction        
Vesting period 3 years      
Tier 2 - Khanyisa ESOP | Maximum        
Share-based payment transaction        
Vesting period 10 years      
Khanyisa Public        
Share-based payment transaction        
Number of Sasol Khanyisa shares   26,503,642    
Weighted average fair value on grant date   R 66.48    
Total IFRS expense   R 1,762,000,000    
Equity-settled share-based payment     R 1,762,000,000